Figure 3
From: Tunable and sizable band gap in silicene by surface adsorption
Band structures of the Na-covered silicene at different coverages.
The Dirac point in (b) and (d) is folded to the Γ point due to the reduction of the first Brillouin zone. The red dashed-line in (c) stands for the band structure of the Na-covered silicene with an h-BN buffer layer. Inset of (e): Orbital of the conduction band bottom at the Γ point. The Fermi level is set to zero.
